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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On >> Circuit/System Testing >> Cooling Fan Always ON

Cooling Fan Always ON

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the KR20C Cooling Fan Low Speed Relay and KR20D Cooling Fan High Speed Relay one at a time, ignition ON.
  2. Verify that the cooling fan is OFF.
    • If the cooling fan is ON after both relays are removed 
    1. Ignition OFF, disconnect the harness connector at the G10R Cooling Fan Motor, ignition ON.
    2. Test for less than 1 V between the appropriate output control circuit terminal 87 and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
    • If the cooling fan is OFF after both relays are removed 
  3. Test or replace the appropriate cooling fan relay.
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